Mass Fraction and Volute Fraction
 

Dear Guys,

I have complete my similuation of a cavitating pump and now I would like to see the cavitating zones at the leading edge of the blades. What should I use? Isosurface of Mass Fraction or Volute Fraction? What kind of value should I set?

For example, if I set the volute fraction isosurface at 0.2 I see a restricted cavitating zone, if I set 0.002 the vapour phase is in vary large zone of the blade channels.

Your help will be very appreciated.

Thanks.

Regards